//
// detail/null_tss_ptr.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef ASIO_DETAIL_NULL_TSS_PTR_HPP
#define ASIO_DETAIL_NULL_TSS_PTR_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"

#if !defined(ASIO_HAS_THREADS)

#include "asio/detail/noncopyable.hpp"

#include "asio/detail/push_options.hpp"

namespace asio {
    namespace detail {

        template<typename T>
        class null_tss_ptr
                : private noncopyable {
        public:
            // Constructor.
            null_tss_ptr()
                    : value_(0) {
            }

            // Destructor.
            ~null_tss_ptr() {
            }

            // Get the value.
            operator T *() const {
                return value_;
            }

            // Set the value.
            void operator=(T *value) {
                value_ = value;
            }

        private:
            T *value_;
        };

    } // namespace detail
} // namespace asio

#include "asio/detail/pop_options.hpp"

#endif // !defined(ASIO_HAS_THREADS)

#endif // ASIO_DETAIL_NULL_TSS_PTR_HPP
